Recent content by Keeeen

It must equal 0? Sorry I'm struggling ot understand how I can get to the final gain of H so rearranging the expression, θo + θD (H * 0.05 * 0.8 - 1) = Vi EDIT : H = 25 I only got this by trial and error by inputting numbers. I can't see or picture how this works though, could you explain...

Ah yes, so if the disturbance was 2 for example, it would become - θo = Vi - H * 0.05 * θD(2*0.4) + 2 θo = Vi - H * 2.08 θo = Vi - 1 * 2.08 = Vi

So potentially from variations in θD the output you would want is the set-point - variations in disturbance.

I have no idea how you would get a transfer function for θD, as it just a disturbance. There's no input to create an output for θD?

Okay I'm not sure if I'm on the right tracks with this, I've got so far - θo = Vi - H * 0.05 * θD (2*0.4) + θD Am i going in the right direction? Not sure how to get the transfer function for θD now I got to this point by - E = Vi - Mv Mv = H * 0.05 * θD E = Vi - H * 0.05 * θD θo = E (PSU...

A transfer function for the disturbance? I thought θD would just = the change in ambient temperature?

Homework Statement FIGURE 3 shows the block biagram of the control of an electric heating system. The heater is driven from a voltage-controlled power supple, the voltage V1 being derived from a potentiometer. The output temperature, θo is subject to distrubances, θd, because of changes in...

Do you know what the question means when they talk about ‘units’?

That thread is a question that is actually on this assignment. It's still not much help to this question I'm on. I'm beginning to think that 'single' transfer lag may actually be 'first-order' transfer lag.

Homework Statement FIGURE 3 shows an open loop system containing a distance velocity lag and a single transfer lag. Figure 3 shows - Xi Xo ---->----[Distance - velocity lag of...

Can you see any limitations of speed control with this circuit? Will the hydraulic motor A only go as fast as the the electric motor E allows with no speed control at all?

This pneumatic circuit currently operates both of the cylinders automatically when the start valve is actuated. I want to modify the circuit so it will fail safe and park both the cylinders in the retracted position

That's more or less how I see it, thanks for the reply!

Can anyone explain the operation of this circuit? I'm finding it hard to understand hydraulic circuits, like where is the source of fluid coming from? I know what all the components are and what they do. It's just trying to understand how it actually operates.

Yeah the coupling I believe will be an opto-isolator. If this is the case the diode will be used as something else?